Disclaimer: This suggestion does not take into consideration Low-level PvP and frankly, doesn't care about it.
What if we had SL-subscriber weapons for all types? In the same vein as the S10 weapons, but available for all types and not prof locked?
There are alot of profs that suffer through the earlier levels of play due to poor weapon options or really messed up IP distribution thanks to a variety of reasons. On that immediately springs to mind is Shotguns. At low levels, pretty much up until you get a decent FSS on, Shotguns are patently abysmal, making playing a Trader (or Shotgun Engy/Crat) nothing short of a horror story.
By opening up a load of new Peren types, we not only cure these low level issues, but also fix the mid range issues other profs suffer with.
Pistols! What does almost every pistol-toting prof have to deal with from 100-150? The dreaded QL199 Kyr Pistol. Everyone has one stuffed away somewhere because EVERYONE has to use it when they making something which primarily uses pistols! Why not give them a new mid-range option?
This also has the benefit of getting people to blow the dust off their tradeskillers for something more than combined alien armour, bring back the lost art of weaponsmithing!